M rating

M was an SHNEARS rating from 1978 to 1985. It meant that the content was suitable for age 14+. In 1985, it was replaced by the 12 rating. It was created to fill the gap between the PG and A1 ratings.

Trivia

 * Its MPAA equivalent is the PG-13 rating.
 * In the MPAA, the PG-13 rating was added to fill the gap between the PG and R ratings. The R rating is equivalent to the former SHNEARS rating A1.
 * As it was a parental advisory rating, it legally served no purpose as anyone could still view works rated M. However, the parents were the reason why it was created.